#include <boost/asio.hpp>
#include <boost/bind.hpp>
#include <boost/enable_shared_from_this.hpp>
#include <iostream>

#include "../include/Sniffer.h"

using namespace boost::asio;
using ip::tcp;
using std::cout;
using std::endl;

class con_handler : public boost::enable_shared_from_this<con_handler> {
private:
  tcp::socket sock;
  std::string message = "Hello From Server!";
  enum { max_length = 1024 };
  char data[max_length];

public:
  typedef boost::shared_ptr<con_handler> pointer;
  con_handler(
      boost::asio::basic_socket_acceptor<boost::asio::ip::tcp>::executor_type
          &io_service)
      : sock(io_service) {}

  static pointer
  create(boost::asio::basic_socket_acceptor<boost::asio::ip::tcp>::executor_type
             &io_service) {
    return pointer(new con_handler(io_service));
  }

  tcp::socket &socket() { return sock; }

  void start() {
    sock.async_read_some(
        boost::asio::buffer(data, max_length),
        boost::bind(&con_handler::handle_read, shared_from_this(),
                    boost::asio::placeholders::error,
                    boost::asio::placeholders::bytes_transferred));

    sock.async_write_some(
        boost::asio::buffer(message, max_length),
        boost::bind(&con_handler::handle_write, shared_from_this(),
                    boost::asio::placeholders::error,
                    boost::asio::placeholders::bytes_transferred));
  }

  void handle_read(const boost::system::error_code &err,
                   size_t bytes_transferred) {
    if (!err) {
      cout << data << endl;
    } else {
      std::cerr << "error: " << err.message() << std::endl;
      sock.close();
    }
  }

  void handle_write(const boost::system::error_code &err,
                    size_t bytes_transferred) {
    if (!err) {
      cout << "Hello World!" << endl;
    } else {
      std::cerr << "error: " << err.message() << endl;
      sock.close();
    }
  }
};

class Server {
private:
  tcp::acceptor acceptor_;
  void start_accept() {
    auto executor = acceptor_.get_executor();
    con_handler::pointer connection = con_handler::create(executor);
    acceptor_.async_accept(connection->socket(),
                           boost::bind(&Server::handle_accept, this, connection,
                                       boost::asio::placeholders::error));
  }

public:
  Server(boost::asio::io_service &io_service)
      : acceptor_(io_service, tcp::endpoint(tcp::v4(), 1234)) {
    start_accept();
  }
  void handle_accept(con_handler::pointer connection,
                     const boost::system::error_code &err) {
    if (!err) {
      connection->start();
    }
    start_accept();
  }
};

int main(int argc, char *argv[]) {
  if (argc < 2) {
    std::cout << "Usage: " << argv[0] << " <interface>" << std::endl
              << std::endl;
    return 0;
  }

  Sniffer sniffer(argv[1]);
  sniffer.startSniffing();

  try {
    boost::asio::io_service io_service;
    Server server(io_service);
    io_service.run();
  } catch (std::exception &e) {
    std::cerr << e.what() << endl;
  }
  return 0;
}